chiques
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Hello Everyone,
I calculated a CPW using Avago’s AppCad. My parameters are:
Εr=3.48
Substrate Thickness=24 mils
Trace Width = 50 mils
Gap=20.5 mils
I build this board and it turns out my transmission and reflection begins to deteriorate really bad after 6 GHz.
I also simulated this on a 3D EM simulator. This also shows both my S11 and S21 are poorly performing.
As a sanity check I made the trace thinner (down to 10 mil) and it significantly improved both S11 and S21.
Does anyone have any idea what I’m doing wrong?:?::?::?::?:
I calculated a CPW using Avago’s AppCad. My parameters are:
Εr=3.48
Substrate Thickness=24 mils
Trace Width = 50 mils
Gap=20.5 mils
I build this board and it turns out my transmission and reflection begins to deteriorate really bad after 6 GHz.
I also simulated this on a 3D EM simulator. This also shows both my S11 and S21 are poorly performing.
As a sanity check I made the trace thinner (down to 10 mil) and it significantly improved both S11 and S21.
Does anyone have any idea what I’m doing wrong?:?::?::?::?: